* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

html,
body {
  /* background-color: #000000; */
  display: grid;
  height: 100%;
  place-items: center;
  overflow: hidden;
}

/*流光溢彩*/
.btn-1 {
  position: relative;
  height: 60px;
  width: 200px;
  margin-top: 500px;
  margin-left: 10px;
  margin: 0 35px;
  border-radius: 50px;
  border: none;
  outline: none;
  background: #fff;
  color: #111;
  font-size: 20px;
  letter-spacing: 2px;
  cursor: pointer;
}

.btn-1:first-child:hover {
  background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4);
  background-size: 400%;
}

.btn-1:last-child:hover {
  background: linear-gradient(90deg, #fa7199, #f5ce62, #e43603, #fa7199);
  background-size: 400%;
}

.btn-1:first-child:before,
.btn-1:last-child:before {
  content: "";
  position: absolute;
  background: inherit;
  top: -5px;
  right: -5px;
  bottom: -5px;
  left: -5px;
  border-radius: 50px;
  filter: blur(20px);
  opacity: 0;
  transition: opacity 0.5s;
}

.btn-1:first-child:hover:before,
.btn-1:last-child:hover:before {
  opacity: 1;
  z-index: -1;
}

.btn-1:hover {
  z-index: 1;
  animation: glow 8s linear infinite;
}

@keyframes glow {
  0% {
    background-position: 0%;
  }

  100% {
    background-position: 400%;
  }
}

/*flash*/
.btn-2 {
  border: 2px solid black;
  background: transparent;
  text-transform: uppercase;
  color: black;
  padding: 15px 50px;
  outline: none;
  overflow: hidden;
  position: relative;
  z-index: 20;
}

.btn-2:after {
  content: "";
  display: block;
  position: absolute;
  top: -36px;
  left: -100px;
  background: black;
  width: 50px;
  height: 125px;
  opacity: 20%;
  transform: rotate(-45deg);
}

.btn-2:hover::after {
  left: 120%;
  transition: all 600ms cubic-bezier(0.3, 1, 0.2, 1);
  -webkit-transform: all 600ms cubic-bezier(0.3, 1, 0.2, 1);
}

/* 波动效果 */
.btn-3 {
  width: 600px;
  height: 400px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.btn-3 button {
  left: 50%;
  transform: translateX(-50%);
  position: relative;
  text-decoration: none;
  font-size: 24px;
  display: block;
  width: 200px;
  height: 40px;
  text-align: center;
  line-height: 40px;
  overflow: hidden;
  margin-top: 20px;
  transition: 0.8s linear;
  box-sizing: border-box;
}

.btn-3 button::before {
  left: 0;
  content: "";
  position: absolute;
  z-index: -1;
  transition: 0.8s linear;
}

.btn-3 button.up {
  color: #ff6348;

  border: 1px solid #ff6348;
}

.btn-3 button.up::before {
  top: 0;
  width: 100%;
  height: 0;
  border-bottom-left-radius: 50%;
  border-bottom-right-radius: 50%;
  background: #ff6348;
}

.btn-3 button.up:hover::before {
  height: 200%;
}

.btn-3 button.up:hover {
  color: black;
}

.btn-3 button.left {
  color: #1e90ff;
  border: 1px solid #1e90ff;
}

.btn-3 button.left::before {
  top: 0;
  width: 0;
  height: 100%;
  border-top-right-radius: 50%;
  border-bottom-right-radius: 50%;
  background: #1e90ff;
}

.btn-3 button.left:hover::before {
  width: 200%;
}

.btn-3 button.left:hover {
  color: white;
}

/* 流光边框 */
.btn-4 {
  position: relative;
  display: inline-block;
  padding: 15px 30px;
  color: #2196f3;
  text-transform: uppercase;
  letter-spacing: 4px;
  text-decoration: none;
  font-size: 24px;
  overflow: hidden;
  transition: 0.2s;
}

.btn-4 span {
  position: absolute;
  display: block;
}

.btn-4 span:nth-child(1) {
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, #2196f3);
}

.btn-4:hover span:nth-child(1) {
  left: 100%;
  transition: 1s;
}

.btn-4 span:nth-child(3) {
  bottom: 0;
  right: -100%;
  width: 100%;
  height: 2px;
  background: linear-gradient(270deg, transparent, #2196f3);
}

.btn-4:hover span:nth-child(3) {
  right: 100%;
  transition: 1s;
  transition-delay: 0.5s;
}

.btn-4 span:nth-child(2) {
  top: -100%;
  right: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(180deg, transparent, #2196f3);
}

.btn-4:hover span:nth-child(2) {
  right: 100%;
  transition: 1.5s;
  transition-delay: 0.5s;
}

.btn-4 span:nth-child(4) {
  bottom: -100%;
  left: 0;
  width: 2px;
  height: 100%;
  background: linear-gradient(360deg, transparent, #2196f3);
}

.btn-4:hover span:nth-child(4) {
  bottom: 100%;
  transition: 1s;
  transition-delay: 0.75s;
}

/* 折叠双层按钮 */
.btn-5 {
  position: relative;
  display: inline-block;
  width: 160px;
  height: 50px;
  /* box-shadow: 0 5px 25px rgba(0, 0, 0, 0.2); */
}

.btn-5 span {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: #6c4ba5;
  color: #ffaa7f;
  display: flex;
  align-items: center;
  justify-content: center;
  text-transform: uppercase;
  font-size: 18px;
}

.btn-5 span:nth-child(2) {
  color: #6c4ba5;
  background: #ffaa7f;
  overflow: hidden;
  z-index: 2;
  transition: 0.5s;
  clip-path: polygon(59% 1%, 100% 0%, 100% 100%, 60% 100%, 40% 51%);
}

.btn-5 span:nth-child(2):hover {
  clip-path: polygon(0 0, 100% 0%, 100% 100%, 0 100%, 0 54%);
}

.btn-5 span:nth-child(1):hover ~ span:nth-child(2) {
  clip-path: polygon(100% 0, 100% 0%, 100% 100%, 100% 100%, 100% 52%);
}

/* btn6 */
.btn-6 {
  position: relative;
  padding: 10px 30px;
  margin: 0 45px;
  color: #21ebff;
  text-decoration: none;
  font-size: 20px;
  text-transform: uppercase;
  transition: 0.5s;
  overflow: hidden;
  -webkit-box-reflect: below 1px linear-gradient(transparent, #0003);
}

.btn-6:hover {
  background: #21ebff;
  color: #111;
  box-shadow: 0 0 50px #21ebff;
  transition-delay: 0.5s;
}

.btn-6:nth-child(1) {
  filter: hue-rotate(115deg);
}

.btn-6:nth-child(3) {
  filter: hue-rotate(270deg);
}

.btn-6::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 10px;
  height: 10px;
  border-top: 2px solid #21ebff;
  border-left: 2px solid #21ebff;
  transition: 0.5s;
  transition-delay: 0.5s;
}

.btn-6:hover::before {
  width: 100%;
  height: 100%;
  transition-delay: 0s;
}

.btn-6::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 10px;
  height: 10px;
  border-bottom: 2px solid #21ebff;
  border-right: 2px solid #21ebff;
  transition: 0.5s;
  transition-delay: 0.5s;
}

.btn-6:hover::after {
  width: 100%;
  height: 100%;
  transition-delay: 0s;
}

/* 边框变色 */

.container {
  text-align: center;
  padding: 200px 0;
}

.btn-7 {
  background: none;
  border: 0;
  outline: 0;
  color: #2196f3;
  font-family: "JetBrains Mono";
  font-size: 20px;
  cursor: pointer;
  border: 2px solid #2196f3;
  width: 250px;
  height: 50px;
  position: relative;
}

.btn-7 label {
  position: absolute;
  left: 0;
  top: 0;
  line-height: 50px;
  width: 100%;
  height: 100%;
  z-index: 1;
  background-color: #ffffff;
}

.btn-7::before {
  content: "";
  position: absolute;
  left: -2px;
  top: -2px;
  width: 0px;
  height: 0;
  z-index: 0;
  background-color: #e94118;
  transition: width 0.5s, height 0.5s;
}

.btn-7::after {
  content: "";
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 0;
  height: 0;
  z-index: 0;
  background-color: #e94118;
  transition: width 0.5s, height 0.5s;

  /* width: calc(100% + 4px);
  height: calc(100% + 4px); */
}

.btn-7:hover {
  color: #e94118;
}

.btn-7:hover::before {
  width: calc(100% + 4px);
  height: calc(100% + 4px);
}

.btn-7:hover::after {
  width: calc(100% + 4px);
  height: calc(100% + 4px);
}

/* 绘制边框 btn-8*/

.btn-8 {
  position: relative;
  width: 240px;
  height: 60px;
  text-align: center;
}

.rectangle {
  stroke-width: 8px;
  stroke: #ff6348;
  fill: transparent;
  /* Core part of the animation */
  stroke-dasharray: 100 500;
  stroke-dashoffset: -372;
}

.btn {
  color: black;
  font-size: 18px;
  letter-spacing: 6px;
  position: relative;
  top: -48px;
}

@keyframes extend {
  to {
    stroke-dasharray: 600;
    stroke-dashoffset: 0;
    stroke-width: 2;
  }
}

.btn-8:hover .rectangle {
  animation: 0.5s extend linear forwards;
}

.btn-9 {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 180px;
  height: 50px;
  /* border: 1px solid #fff; */
  background: #fff;
  color: #ff6348;
  font-size: 18px;
  line-height: 50px;
  text-align: center;
  text-transform: uppercase;
  text-decoration: none;
  font-family: geneva;
}

.btn-9::before,
.btn-9::after,
.btn-9 span::before,
.btn-9 span::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  background: #ff6348;
  mix-blend-mode: hue;
  transition: 1s;
}

.btn-9::before {
  top: -2px;
  left: -2px;
}

.btn-9::after {
  top: -2px;
  right: -2px;
}

.btn-9 span::before {
  bottom: -2px;
  left: -2px;
}

.btn-9 span::after {
  bottom: -2px;
  right: -2px;
}

/* 上下左右 */
.btn-9:hover::before,
.btn-9:hover::after,
.btn-9:hover span::before,
.btn-9:hover span::after {
  width: calc(180px / 2);
  height: calc(50px / 2);
}

/*波动按钮 btn-10*/
.btn-10 {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: block;
  padding: 10px 15px;
  border: 1px solid #262626;
  color: #262626;
  text-transform: uppercase;
  text-decoration: none;
  letter-spacing: 2px;
  transition: 0.5s;
}

.btn-10:hover {
  background: #262626;
  color: #fff;
}

.btn-10:before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 100%;
  height: 100%;
  background: transparent;
  border: 1px solid #262626;
}

.btn-10:hover:before {
  transform: scale(1.2, 1.4);
  opacity: 0;
  transition: 0.5s;
}

/*btn-11 故障风*/
.btn-11,
.btn-11::after {
  font-family: "Do Hyeon", sans-serif;
  width: 260px;
  height: 80px;
  text-align: center;
  font-size: 22px;
  line-height: 80px;
  color: rgb(255, 251, 251);
  background: linear-gradient(
    30deg,
    transparent 10%,
    rgb(255, 136, 0) 10% 95%,
    rgb(0, 255, 149) 95%
  );
  box-shadow: 5px 0 0 rgb(0, 204, 255);
  cursor: pointer;
  position: relative;
}

.btn-11::after {
  content: "Button";
  position: absolute;
  top: 0;
  left: 0;
  text-shadow: -5px -2px 0 rgb(0, 183, 255), 5px 2px 0 rgb(0, 255, 115);
  visibility: hidden;
}

.btn-11:hover::after {
  animation: san 1s;
  animation-timing-function: steps(1, end);
}

/* 
       
       clip-path: inset(20% -5px  60%  0);
       clip-path: inset(50% -5px  30%  0);
       clip-path: inset(80% -5px  5%  0);
       clip-path: inset(0 -5px  80%  0);
       
       
        */
@keyframes san {
  0% {
    clip-path: inset(20% -5px 60% 0);
    transform: translate(-6px, 5px);
    visibility: visible;
  }

  10% {
    clip-path: inset(50% -5px 30% 0);
    transform: translate(6px, -5px);
  }

  20% {
    clip-path: inset(20% -5px 60% 0);
    transform: translate(5px, 0px);
  }

  30% {
    clip-path: inset(80% -5px 5% 0);
    transform: translate(-8px, 5px);
  }

  40% {
    clip-path: inset(0 -5px 80% 0);
    transform: translate(-4px, -3px);
  }

  50% {
    clip-path: inset(50% -5px 30% 0);
    transform: translate(-6px, -5px);
  }

  60% {
    clip-path: inset(80% -5px 5% 0);
    transform: translate(-7px, 5px);
  }

  70% {
    clip-path: inset(0 -5px 80% 0);
    transform: translate(3px, 6px);
  }

  80% {
    clip-path: inset(50% -5px 30% 0);
    transform: translate(5px, 5px);
  }

  90% {
    clip-path: inset(20% -5px 60% 0);
    transform: translate(6px, -5px);
  }

  100% {
    clip-path: inset(0 -5px 80% 0);
    transform: translate(1px, 5px);
  }
}

/*btn-12 绘制边框-流光*/
.btn-12 {
  position: relative;
  width: 300px;
  height: 95px;
  color: rgb(18, 190, 243);
  letter-spacing: 12px;
  font-size: 35px;
  line-height: 100px;
  text-align: center;
  text-transform: uppercase;
  user-select: none;
  text-decoration: none;
  overflow: hidden;
  /* box-shadow: inset 0 0 10px rgb(14, 20, 105), */
  /* 0 0 5px rgb(9, 208, 235); */
  transition: all 0.5s;
}

.btn-12:hover {
  text-shadow: 0 0 5px rgb(18, 190, 243), 0 0 8px rgb(18, 190, 243),
    0 0 10px rgb(18, 190, 243);

  /* box-shadow: inset 0 0 10px rgb(14, 20, 105),
            0 0 5px rgb(9, 208, 235),
            0 0 10px rgb(9, 208, 235); */
}

.btn-12 span {
  position: absolute;
}

.btn-12 span:nth-child(1) {
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-image: linear-gradient(to right, transparent, rgb(0, 153, 255));
  animation: move1 2s linear infinite;
}

@keyframes move1 {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

.btn-12 span:nth-child(2) {
  top: 0;
  right: 0;
  width: 2px;
  height: 100%;
  transform: translateY(-100%);
  background-image: linear-gradient(to bottom, transparent, rgb(0, 153, 255));
  animation: move2 2s linear infinite;
  animation-delay: 1s;
}

@keyframes move2 {
  100% {
    transform: translateY(100%);
  }
}

.btn-12 span:nth-child(3) {
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-image: linear-gradient(to left, transparent, rgb(0, 153, 255));
  animation: move3 2s linear infinite;
}

@keyframes move3 {
  0% {
    transform: translateX(100%);
  }

  100% {
    transform: translateX(-100%);
  }
}

.btn-12 span:nth-child(4) {
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  transform: translateY(100%);
  background-image: linear-gradient(to top, transparent, rgb(0, 153, 255));
  animation: move4 2s linear infinite;
  animation-delay: 1s;
}

@keyframes move4 {
  100% {
    transform: translateY(-100%);
  }
}
